Github user StephanEwen commented on a diff in the pull request: https://github.com/apache/flink/pull/2693#discussion_r85080051 --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/SingleInputGate.java --- @@ -222,6 +226,20 @@ public int getPageSize() { } } + public int getNumberOfQueuedBuffers() { + int totalBuffers = 0; + + for (Map.Entry<IntermediateResultPartitionID, InputChannel> entry: inputChannels.entrySet()) { --- End diff -- I think this map may change asynchronously, so it is probably better to catch exceptions here and re-try for some times. It it fails three times, return `-1` for "unknown"
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